A New Analytical Framework for the Fertilization Problem
基于李比希最小因子律和米切利希相对产量理论，构建了一个多阶段可分离规划模型，用于优化施肥决策，并以巴西南部小麦-大豆轮作系统为例，发现最佳肥力目标水平与农学家建议接近，但维持建议可大幅改进。
Abstract A novel control model for technical and economic analysis of fertilizer recommendations is based on Liebig's Law of the Minimum, Mitscherlich's relative yield theory, and the notions of yield plateau and soil fertility carry‐over. The empirical model consists of a multistage separable programming specification which maximizes the discounted stream of net revenues subject to crop response and fertility carry‐over functions. The model is applied to the wheat‐soybean cropping system in Southern Brazil. It is found that, while the optimal fertility target levels are within a small range of those determined by Brazilian agronomists, their maintenance recommendations could be substantially improved.